The Problem Stated 29 



In this concentration and dissipation of 

 animal energy, time is always a factor. 

 Omitting the two extremes of infancy and 

 senility, we may say that if the concentration 

 uniformly exceeds the dissipation, or the 

 dissipation uniformly exceeds the concentra- 

 tion, the total gain or total loss may be 

 determined by considering the age of the 

 animal. The maximum amount of concen- 

 tration which can occur in any animal is, 

 therefore, limited only by the rate at which 

 the concentration takes place and the age of 

 the animal at which the process ceases or is 

 interrupted. Or, stated in another form, a 

 very great accumulation of energy within 

 an individual made directly by this process of 

 concentration, can exist only in compara- 

 tively old animals. This should not be taken 

 to mean that an animal has a large amount of 

 energy simply because it is old. The state- 

 ment that man is an animal does not imply 

 that an animal is a man. 



In what precedes is stated a process by 

 which energy is concentrated within an ani- 



